Well, if you really are that desperate to know
I think bragging is totally stupid, totally immature and (especially when you're still young) totally understandable - at least the kind of bragging where your motivation is not "Oh, I'm so cool. Look at me. I'm a sex-god." but rather "It was so fantastic. I have to share my joy with someone.".
Anyway, I prefer to talk about it when the topic comes up and to keep my mouth shut when it does not.